2011

8.1

2009

8.0

2010

7.9

2000

7.6

2002

8.6

2006

7.9

2005

7.9

1987

7.1

1994

7.6

1975

7.2

0.0

2021

6.8

1992

6.5

2007

6.5

1997

8.0

2024

0.0

1982

6.3

2002

8.2

2019

7.1

2008

7.7